﻿/*
 * Copyright (c) 2011
 * Thomas Rozanski, Geoffrey Wright, Zachary Lynn, Jesse Natalie
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the team nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THOMAS ROZANSKI, GEOFFREY WRIGHT,
 * ZACHARY LYNN, OR JESSE NATALIE BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Xna.Framework;

namespace TowerDefense
{
    /// <summary>A path is a list of points.</summary>
    class Path
    {
        private List<Vector2> positions;

        public Path()
        {
            positions = new List<Vector2>();
        }

        public Path(Vector2 start)
        {
            positions = new List<Vector2>();
            positions.Add(start);
        }

        /// <summary>Adds a point to the end of the path.</summary>
        public void AddPathPosition(Vector2 position)
        {
            positions.Add(position);
        }

        /// <summary>Returns the point at the specific index.</summary>
        public Vector2 GetPosition(int segment)
        {
            if (positions.Count > segment)
            {
                return positions[segment];
            }

            return new Vector2(0.0f, 0.0f);
        }

        /// <summary>Is there a point after this segment?.</summary>
        public bool HasNextPosition(int segment)
        {
            return positions.Count > segment;
        }

        /// <summary>Returns how many points are in the path.</summary>
        public int Size()
        {
            return positions.Count;
        }
    }
}
